never seen that much current but my system will charge 70 to 80 amps. All of a sudden I'm not charging anything. It's like my inverter/charger quits working. I jumper the switch and everything is fine. They may be rated at only 100 amps. I'm not sure. The switch turns on and off just like normal so you need to check it with a meter or as I did and just move one lead to the other post to jumper it out as a test.